Residential RO production is a trickle of water
The only place where you experience high flow is between the storage (bladder tank) and the fixture. If this section is relatively short - then 1/4” tubing is more than adequate
If you absolutely cannot place the storage near the demand - then you may need to upsize tubing, but you’ll have a lot more fittings, stagnant water, etc
Stick with the 1/4” unless absolutely necessary
The only place where you experience high flow is between the storage (bladder tank) and the fixture. If this section is relatively short - then 1/4” tubing is more than adequate
If you absolutely cannot place the storage near the demand - then you may need to upsize tubing, but you’ll have a lot more fittings, stagnant water, etc
Stick with the 1/4” unless absolutely necessary